Adjustable impulse generator



y 1,622121 March 22 1927' c. L. PAuLUs ET AL ADJUSTABLE IMPULSE GENERATOR Filed July 25, 1924 /N VEA/TOR harlajlkPau/u Eaber/ Kallo/1 vBV - vPatented Mar.y 2 2, 71927.

an impulse A pulse generator.

.UNITED STATES CHARLES L. rAULus AND ROBERT xAUcn, or DAYTON, omo.

ADJUSTABLE MPMan-GENERATOR.

Application led July 1924. Serial No. 728,190.

` This invention relates to synchronized gun controls and is an improvement on the control at present in use in which the trigger of a machine gun is synchronously operated with the speed ofthe engine.

The object of this invention is enerator for use in synchronize gun contro which incorporates means to to provide adjust the angle of departure of the impulse cable, so that equipment on the airplane such as parts of the motor, generator, etc., may be cleared bythe impulsecable easing. The impulse generator is adapted to be adjustable so that the impulse cable may be adjusted either up and down or side-ways.

Further objects will be more fully set forth in the attached specification, inthe claims, and in the drawings, in which i Fig. 1 is a. plan view of ourimproved im- Fig. 2 is a vertical section ot the same on the line 2-2 of Fig. l.

Fig. 3 is an elevation of the impulse generator, and

Fig. 4 is a section on the line -t-4 of Fig. 3. l

Referring to the drawings by reference y numerals, the bevel gear l which is adapted with an impulse cani to l-.c driven from the engine shaft of an airplane is fixed to and operates an impulse shaft 2, which is provided at its upper end il provided with two lobes 4 and 5. The. mounted by means of ball bearings 6 and 7 in a housing 8 which extends over the top ofthe shaft 2 and cam 2l, extending part Way round the same. The housing 8 is provided with a flanged portion 9 which is provided with :in outer, plane, substantially vertical tace, to which a flanged portion 1() of a support casting 1l may be secured.

The support 11 forms ameans of attachment of an impulse lever 12, which is pivoted V on an axis 13 and provided with a curved d ler blades.

impulse shaft 2 is PATENT. OFFICE.

constant speed, the impulse cam 3 will operate to rapidly oscillate the lever 12 a out its pivot 13 so as to give a series of pulls upon the operating cable 17 to operate the cable in synchronism with thepropeller, so that. the gun may tire between the propeLl When it is desired to stop this operation, a `locking p in 20 is released by releasing the pull reviously maintained upon a releasing eab e 21, so that a spring 22 forces the locking pin 20 into the position as shown in Fig. 2, where itv engages the curve of the arm 14 so as to hold the end of this arm away from engagement with the impulse cam, and under such conditions the un will cease firing.

Tie housing 8 is provided with a lower flange 23 which rests on and is adjustably secured to a. base member or.plate 24. The lower housing flange and the base member 24 are provided with a series of Vernier holes 25 of which there are preferably two more holes in one of the members than in the other, so that a vernier adjustment may be provided by means of two bolts 2li, which interconnect and detachably secure in an adjustable manner, the housm and the base member. In the drawings theliousing flange is shown as provided with 18 holes,` the holes being equally spaced in each member so that very small relative adjustments'niay be made. These adjustment-s permit variation in the direction in which the operating cable 17 extends away from the impulse generator horizontally.

The direction in which the operation' cable 17 extends may be at'ljusledvertically v adjustinent'oil the support 11 upon the ange 9 ot' the housing. T his adjustment is permitted by a second series of vernier holesl 27 and two bolts 28 which permit the snpport 11 to be rotated about an axis corie' sponding to the point where the cam operates upon the impulse lever 12, which isof Inu course also the loci of the 'centers of the vernier holes 27.

The base member 24 is adapted to be se- Cured to a fixed oart of the engine frame indicated at 29 by a series of holes 3() and bolts 3l. Four equally s accd holes 3() are shown in the example inticated by the drawings Fo that the entire unit may be lifted vertical ly from the part 29 of the motor and rotated thru a 90 or 180 angle in either direction so as to make adjustments in the timing of the tiring of the gun, while still nia housing,

permitting the vernieradjustment to vary Athe direction of departure ofl the impulse cable.

From the description of the device referred to it will be evident that it is an easy matter to adjust the direction of departure of the impulse' cable from the impulse generator about a line coinciding with the axis of the impulse shaft 2 and also about an axis intersecting the axis of the shaft 2 at an angle of 90.

We claim:

1. An impulse generator comprising a housing, an impulse cam therein rotatable about an axis, an impulse lever operated by said cam, means for rendering said lever inoperative, a support for said impulse lever, and means for adjusting said support on said housing said impulse cam being housed -by the housing and the support.

2. An impulse generator comprising a an impulse cani therein, an impulse lever operated by said cam, means for rendering said lever inoperative, a support for said impulse lever, a series of Vernier holes in said housing and said support, for permitting small changes of adjustment on said support. j v

3. An impulse generator comprising a housing, an impulse cam therein, an impulse lever operated bysaid cam, a. support for said impulse lever, \means for adjusting said support on said housing, a base member, and a means foradjusting said housing on said base member.

4. An impulse generator comprisingr a housing, an lmpulse'cam therein, an impulse lever operated by said cam, means for rendering said lever inoperative, a support for said impulse levermeans for adjusting said support on said housing, a base member,

' means for attaching said base member to an object, and means for adjusting the housingvon said base member.

5. An impulse generator comprising a housing, an impulse shaft, a cam thereon, an impulse lever having an end bearing on and operated by said cam, a support for Said impulse lever, and means for quickly adjusting said su port on said housing about un axis passing t rough the point of Contact of said lever on said cam, said means permitting adjustment of said su port about an axis intersecting the axis oi) said shaft and at right angles thereto.

6. An impulse generator comprising a housing, an impulse shaft, a cam thereon, an impulse lever operated by said cam, a support for said impulse lever, a series of vernier holes in the support, and housing, for adjustably attaching said support to said housin said means permiting adjustment of sai support aboutan axis intersecting the axis of said shaft and at right angles v thereto, a base member, and a series of ver nier holes in said base member and. housing, for adjustably attaching said housing to said base member.

7. An impulse generator for synchronized gun control, comprising a housing, an impulse shaft therein, a cam mounted coaxially on said shaft, an impulse lever having an arm actuated by said cam, a pivot for said lever, a support for said impulse lever pivot having a plane, substantially vertical face,

a corresponding vertical face on said hous-v ing, means for quickly attaching and ad' justing said support to said housing, said means permiting adjustment of said support about a transverse axis intersecting the axis of said shaft in the cam location, and means connected to said lever to transmit impulses to a part -to be controlled.

In testimony whereof we aflix our signatures.

CHARLES .L. PAU LUS. ROBERT KAUCH. 

